211520530223 has 8 divisors (see below), whose sum is σ = 218855077200. Its totient is φ = 204188699008.

The previous prime is 211520530217. The next prime is 211520530259. The reversal of 211520530223 is 322035025112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211520530223 - 2⁸ = 211520529967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211520530192 and 211520530201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211520530283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519833 + ... + 832626.

It is an arithmetic number, because the mean of its divisors is an integer number (27356884650).

Almost surely, 2^211520530223 is an apocalyptic number.

211520530223 is a deficient number, since it is larger than the sum of its proper divisors (7334546977).

211520530223 is a wasteful number, since it uses less digits than its factorization.

211520530223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357881.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 211520530223 its reverse (322035025112), we get a palindrome (533555555335).

The spelling of 211520530223 in words is "two hundred eleven billion, five hundred twenty million, five hundred thirty thousand, two hundred twenty-three".